• Commissioner at Lisbon (Sept 1797)
• Commissioner at Sheerness (1799)
• Promoted directly to Rear-Admiral of the White from Post-Captain.
• By royal license, he assumed the surname of Greenly upon marriage to Elizabeth Browne Greenly (1811). However, he relinquished the name in March 1813.
• MP Ilchester (1818–1826)

Further Reading:

1804. Biographical Memoir of Sir Isaac Coffin, Bart. Rear-Admiral of the White Squadron. The Naval Chronicle. 12:1–12.Amory, Thomas Coffin. 1886. The Life of Admiral Sir Isaac Coffin, Baronet, his English and American Ancestors. Boston: Cupples, Upham and Company.Coffin, Robert P. Tristram. 1951. Sir Isaac Coffin, Bart. (1759-1839) Admiral and Prophet. New York: The Newcomen Society in North America.